儿童补锌与生长发育相关性研究

目的:探讨儿童补锌对血锌水平的影响及与儿童体重、身高、智商等发育的相关关系。方法:用分层加单纯随机抽样的方法对抽取的168例儿童进行体格检查、血锌浓度测定、智商测定,并问卷调查儿童饮食、补锌等情况,采用SPSS10.0版统计软件进行多元线性回归分析。结果:①本组168例儿童血锌平均浓度为58.98μmol/L,正常血锌儿童占75.0%,低血锌儿童占25.0%。②儿童血锌水平与性别无关,与年龄有高度显著性差异(χ2=20.08,P<0.01),3~6岁儿童缺锌比例较7~12岁儿童高。③血锌水平影响儿童体重、身高发育,低血锌儿童体重、身高发育指标低于正常的比例高(χ2=24.52,P<0.01,χ2=29.03,P<0.01,)。④影响血锌水平的因素主要为饮食与补锌情况。⑤影响智商的因素为血锌水平与补锌情况。结论:正常饮食儿童低血锌比例低,偏食、挑食、厌食是引起血锌偏低的主要因素,血锌水平影响智商高低。科学对待儿童缺锌与补锌,理性对待广告宣传,纠正不良饮食习惯是保障儿童锌营养的关键。

Research on children''''s Zinc supplementation and growth

Objective:To probe the influence of children's Zinc supplementation on their Zinc blood levels and the relationship between children's Zinc supplementation and their growth and development of height,weight and IQ.Objects 168 children aged three to twelve from the district at random.Methods:By the survey method of stratified and simple random sampling,give physical examinations,Zinc blood level tests and questionnaires about the dietary status and zinc supplementation to those 168 children,and use the SPSS 10.0 version statistical software to make the multiple linear regression analysis.Results:The average blood Zinc concentration of the group(168 children) is 58.98 umol/L.The children with normal blood Zinc concentrations account for 75.0% and the children with low blood Zinc levels,25.0%;②The blood zinc concentrations of the children has no bearing on gender,but there exist very notable differences according to their ages(χ2=20.08,P<0.01).The proportion of children with Zinc deficiency aged 3 to 6 is larger than the children aged 7 to 12;③Blood zinc levels will influence children's growth(such as height and weight).For the children with low blood zinc levels,their indexes of physical development(height and weight) are more likely below the normal level(χ2=24.52,P<0.01,χ2=29.03,P<0.01);④The main factors which will have an influence on the blood Zinc level are diet and Zinc supplementation status;⑤The factors which will influence children's IQ are blood Zinc levels and Zinc supplementation status.Conclusion:The proportion of low blood Zinc levels is small in the children with well-balanced diet.Anorexia,food preferences and aversions are the main causes leading to low blood Zinc levels.Blood Zinc levels will influence the children's IQ.Treating children's Zinc deficiency and Zinc supplementation scientifically,treating advertisements for Zinc supplements rationally,and correcting the unhealthy dietary habits are the keys to children's Zinc nutrition.